<span>2x-y = -4 OR y = 2x+4
-3x+y=44
-3x + (2x+4)= 44
-x = 40
x = -40 and y = -76 (2*-40 + 4)
c-5d=2 OR c = 5d + 2
2c + d =4
2(5d+2) + d = 4
11d = 0
d = 0 and c = 2 </span>
The number is 4.5 because 2 thirds of 4.5 is 3 and 3 plus 4 is 7.
A it is a many to one function
Answer:
1) 20%
2) Choice a.
Step-by-step explanation:

1)
is the population initially.
is the population after a year.
represents the population increase factor.
So let's evaluate that fraction:


0.2=20%
2) Let's figure out the population growth in terms of months instead of years.

We want t to represent months.
A full year is 12 months, in a full year we have that 
So we want a new P such that
since 12 months equals a year.
Let's look at the functions given to see which gives us this:
a) 
b) 
c) 
d) 
So a is the function we want.
Also another way to look at this:
where
is in years.
where
is in months.
And 
The equation is asking you to multiply.
= 4 * -7
= -28
Hope This Helped! Good Luck!